Valve construction



April 25, 1939. F. Mv HUDSON VALVE CONSTRUCTICN Filed July 12, 1957 4 v #4. .6 a 5 a 3 k 6 .5 \QWV VV 5 3 v I? g a Z w w a ATTORNEKS.

Patented Apr. 25, 19 39 UNITED STATES PATENT OFFICE VALVE CONSTRUCTION Frank M. Hudson; Walnut Park, Calif., assignor to Pacific Pump Works, Huntington Park, Calif., a corporation of California Application July ,12, 1937, Serial No. 153,208 '1 Claim. (01. 251-121 My invention relates to valves, and particularly to a ball cage valve construction adapted for fluid pumps and the like as either a standing valve or a traveling valve therefor.

It is a common characteristic of ordinary ball valves that when the ball is unseated and fluid is flowing through the valve seat, the ball is caused to spin or chatter by the force of the fluid. This spinning or chattering of the ball is caused by fluid surging -or eddying around the upper surface of the ball within the ball chamber.

This eddying of fluid around the ball is par,- ticularly -disadvantageous in pumping oil as in some instances where there is water present in the oil, the eddying or surging of the fluid around the ball within the valve cage results in consid erable cutting" or emulsifying of the oil and water. 1 1 i It is therefore an object of the invention to provide in a ball valve construction a recess in the ball chamber or cage into which the ball moves when it is unseated from the valve seat to prevent eddying of the fluid around the top of the ball within the cage. It is another object of my invention to provide in avalve construction including a valve seat, a ball seat disposed to be engaged by the ball when it is unseated from the valve seat; the ball seat conforming to substantially half the spherical surface of the ball, whereby eddying of the fluid around the upper surface of the ball within the valve chamber or cage is prevented.

It is another object of my invention to provide in a valve construction including a valve seat. a ball seat disposed to be engaged by the valve ball when it is unseated from the valve seat so that the ball is held by the ball seat in a centralized position with respect to ,the valve seat so that the ball will drop more directly into the valve seat and the ball is prevented from chattering when it is unseated from the valve seat.

These and other objects will be apparent from the following part of the specification in conjunction with the accompanying drawing. In the drawing:

' Fig. 1 is a longitudinal section through a portion of a pump barrel, showing the novel features of my'valve structure; f

Fig. 2 is a cross-section taken as indicated by the line 22 of Fig. 1; and

Fig. 3 is a horizontal cross-section talrenas indicated by the line 3-3 oi Fig. 1.

In Fig. 1, I show my valve structure .as-being included in a fluid pump structure ll comprising 5 a barrel II, to the upper threaded end it of seat I6 is a cylindrical ball chamber 20 terminat- 10 ing at the upper end in a substantially semispherical surface 2i, which I shall hereinafter refer to as the ball seat to distinguish this seat from the valve seat IS. The largest diameter of the semi-spherical surface 2| defined by 15' the peripheral edge 22 indicated in Fig. 1, is only slightly smaller than the diameter of the cylindrical ball chamber 20, as shown. Formed in the side wall of the cage M are aplurality of outwardly flaring openings 23, preferably formed 20 by providing grooves 24 in the outer surface of the cage of such depth that the lower ends of the grooves communicate with the valve chamber 20'as shown. The'lower walls 25 of the grooves 24 formingthe openings 23 preferably are formed 26 to slope downwardly from the outer surface of the cage to the point of communication with the ball chamber 20 substantially as shown. A valve ball 30 is confined within the ball chamber and preferably is of such a diameter as to substantially i completely fill the cross-sectional diameter of the chamber 20, while being freely movable therein from its seated position-on the valve seat I6, as indicated by dotted lines; into its seated position in the ball seat 2|, as indicated in solid 35 lines.

It will be noted that'with the ball 30 seated in the ball seat 2| substantially the entire upper half of the spherical surface of the ball is covered, which effectively prevents surging or eddy- 4o ing of fluid around theupper surface of the ball, as in the ordinary type of ball valve having a flat surface against which'the ball bumps when it is unseated. Likewise, with the ball 30 in the raisedpositio'n and substantially completely 4g filling the cross-sectional area of the baIPchamher, the smooth under-surface of the ball coopcrates with the walls forming the openings 23 .to cause a smoothfiow of liquid outwardly and upwardly to the exterior of the pump without so undue agitation of the liquid which in the case of oil and water mixture tends to cause cutting of the oil.

My invention has a special utility since it can be applied to existing pumps. When so applied;-

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